as and when


as and when idiom meaning, synonym

as and when


  • at the time when (used to refer to an uncertain future event)
  • at the time that something happens
  • at the time when something required
  • at the exact time when something will happen


“As and when” is just another adaptation of “if and when”. “If” means it may or may not be needed. “When” means it will be needed. “As and when”, often used in statements of requirement, obligation, condition and necessity etc.

Example Sentences

  1. Most people in this city don’t own a car – they just rent one as and when they need it.
  2. We will inform you as and when your order will be ready.
  3. We will update the information on our website as and when required.
  4. I always explained everything to my boss about the status of project as and when he asked.
  5. I never go to the cinemas, I just watch the movies at home as and when I need.
  6. He always carries with him a pocket diary and note down the thoughts as and when they comes to his mind.
  7. As and when the time comes we will go there to see the results.
  8. My dream is to create a virtual book that can deliver, wrap and record an individual’s learning as and when they need it.
  9. Banks store and obtain the signature of owners as and when required.
  10. They provide best technical support to the customers as and when required.


“As and when” is a conjunction that denotes “at the time that” or “whenever.” Although its origin is unknown, it has been used in formal and informal contexts throughout English for many centuries. The word “when as” in Middle English, which meant “at the time that” or “in the event that,” may have evolved into the current phrase. When first used, “when as” was abbreviated to “when,” then to “as when,” and finally to “as and when.”

Though both of the words as and when are quite similar in meaning and synonym, we further explain synonymous of them individually. Hopefully, this will help to understand this idiom better.

“as” Synonyms:
– because, since, seeing that, while, when, as the same time as, the same as, like.

“when” Synonyms:
– at what time, while, whilst, as, what time, after, as soon as, once.

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Can we use the idiom with past tense?

‒ Soma April 17, 2018

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